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Shop 16-High Horizontal Depot Mailboxes

4C mailboxes are meant to make installation of your mail delivery system a lot easier since they can be placed in freestanding depot enclosures rather than recessed into walls. They are typically used at colleges, schools, postal centers, and government agencies. With a weather-resistant powder coat, they can be installed indoors or outdoors. 

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USPS Mailboxes

Subject to local regulations and installation requirements, our products can comply with USPS standards, as defined by the Postmaster General.

Please note that the USPS periodically updates mailbox standards and guidelines. Before proceeding with mailbox projects, we recommend you consult with your local Postmaster to comply with your specific area guidelines. US Mail Supply experts are standing by to help you navigate the product selection and installation process.

16-High 4C Horizontal Depot Mailboxes from US Mail Supply16-High 4C Horizontal Depot Mailboxes

  • These mailboxes are NOT USPS Approved. They will require permission from your Local Postmaster prior to purchase!
  • Available in 8 powder coat finishes: Antique Bronze, Black, Dark Bronze, Gold Speck,  Sandstone, Silver Speck, White, Postal Gray.

Buy 4C Depot Mailbox Units for Your Apartment Complex

These depot mailboxes are the perfect mailboxes for either a residential or commercial setting. Featuring thick, reinforced collection doors, overlapping seams, and an exclusive double-latching lock for extra strength, these mailboxes are made to keep mail and packages safe from thieves, critters, and severe weather patterns.

On top of being functional, these depot mailboxes are stylish. Coming in eight durable powder coat finishes, these are sure to be an elegant complement to any décor. 

Learn about USPS Approval requirements

All new constructions are required to have USPS compliant mailboxes. We provide information on what the standards and specifications are, so you know what comes next after purchasing your new 4C mailbox from US Mail Supply.

Check out our extensive list of 4C Wall Mounted Horizontal Mailboxes.

Contact us today to get a quote on horizontal depot mailboxes from US Mail Supply.